The effect of whole-body vibration and resistance training on muscle strength in a 13-year-old boy with m. biceps femoris lesion and posttraumatic calcification.
2015
Introduction. Skeletal muscle atrophy is a common adaptation after major
muscle lesion of m. biceps femoris that results in numerous health-sport
related complications. Resistance strength training and whole-body vibration
(WBV) have been recognized as an effective tool, which attenuates atrophy and
evokes hypertrophy. Case report. We presented a 13-year-old boy with a lesion
of m. biceps femoris and posttraumatic calcification sustained in soccer
training session 6 month prior participation in this study. The patient
underwent training 3 times a week for 7 weeks, including unilateral
progressive WBV + resistance training (RT) of the right hamstrings muscle
group using WBV and weights. Hamstrings muscle strength was measured using a
Cybex isokinetic dynamometer. At the end of week 4, the patient peak torque
value of the involved leg increased from 39% body weight (BW) to 72% BW and
bilateral deficit decreased from -64% to -35%; at the end of week 7 the
participant’s peak torque value of the involved leg increased from 72% BW to
98% BW and bilateral deficit decreased from -35% to -3%, respectively.
Conclusion. Unilateral WBV + RT protocol evokes strength increase in the
hamstrings muscle group. This case study suggests that adding WBV, as well as
the RT program have to be considered in the total management of strength
disbalance. Further studies are needed to verify the efficiency of WBV + RT
protocol over the classic physical therapy exercise program.
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